Welding tool for butt joint circular seam of stainless steel rocket storage tank short cylinder and end socket

Abstract

The utility model provides a welding tool for butt joint circular seams of a short cylinder and a seal head of a stainless steel rocket storage tank, which comprises a short cylinder-seal head supporting base and a foldable stand column module, and the short cylinder-seal head supporting base is used for supporting the foldable stand column module; the foldable stand column module comprises a short cylinder-end socket supporting stand column and a short cylinder-end socket inner supporting module, and the short cylinder-end socket inner supporting module can rotate around the short cylinder-end socket supporting stand column so that the free end of the short cylinder-end socket inner supporting module can be close to or away from the short cylinder-end socket supporting stand column. The foldable stand column module can rotate in the circumferential direction of the short cylinder-end socket supporting base so as to drive the short cylinder-end socket inner supporting module to rotate in the circumferential direction of the short cylinder-end socket supporting base, and a butt joint circular seam of a short cylinder and an end socket is supported. By means of the welding tool, the butt joint girth welding process of the stainless steel storage box short cylinder and the end socket can be simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of carrier rocket, concretely relates to a kind of welding tool for the butt joint ring seam of stainless steel rocket storage tank short cylinder and head. BACKGROUND

[0002] In the manufacturing process of existing large-diameter stainless steel rocket storage tank, the butt joint ring seam welding of stainless steel storage tank short cylinder and head is mostly adopted by whole circular inner support tooling.In the manufacturing link, whole circular inner support tooling needs to be clamped once, and the welding of whole rotary circular ring seam between short cylinder and short cylinder needs to be completed once.Moreover, whole circular inner support tooling cannot be directly applied to the ring seam welding of head and cylinder segment after clamping, and needs to be installed in the interior of cylinder segment or head, and is removed after welding, so that the whole process is complicated, process control is difficult, and the weld cannot be leveled.

[0003] To simplify the butt joint ring seam welding process of stainless steel storage tank short cylinder and head, realize the stable and controllable welding process, and improve the weld quality, it is particularly important to design a kind of welding tool for the butt joint ring seam of stainless steel rocket storage tank short cylinder and head. SUMMARY

[0004] The utility model aims at overcoming the insufficient of prior art, provide a kind of welding tool for the butt joint ring seam of stainless steel rocket storage tank short cylinder and head.

[0005] The utility model provides a kind of welding tool for the butt joint ring seam of stainless steel rocket storage tank short cylinder and head, including: short cylinder-head support base and foldable column module, the short cylinder-head support base is used to support the foldable column module;The foldable column module includes short cylinder-head support column and short cylinder-head inner support module, the short cylinder-head inner support module can rotate around the short cylinder-head support column, to make the free end of the short cylinder-head inner support module close to or away from the short cylinder-head support column;The foldable column module can rotate around the circumferential direction of the short cylinder-head support base, to drive the short cylinder-head inner support module rotate around the circumferential direction of the short cylinder-head support base, and the butt joint ring seam of short cylinder and head is supported.

[0006] According to one embodiment of the utility model, the short cylinder-head inner support module includes connecting arm and short cylinder-head inner support block, the connecting arm two ends are connected with the short cylinder-head support column and the short cylinder-head inner support block respectively;The short cylinder-head inner support block is used to support the butt joint ring seam of short cylinder and head;The connecting arm can rotate around the short cylinder-head support column, to drive the short cylinder-head inner support block close to or away from the short cylinder-head support column.

[0007] According to one embodiment of the utility model, short cylinder - head inner support module still include connecting rod, connecting rod both ends are used for connecting the free end of connecting arm and short cylinder - head inner support block respectively, connecting rod can revolve around connecting arm, to make short cylinder - head inner support block close or far from the butt joint ring seam of short cylinder and head.

[0008] According to one embodiment of the utility model, short cylinder - head inner support module still include first drive connecting rod, one end of first drive connecting rod is connected with short cylinder - head support stand through first screw rod sliding block, the other end of first drive connecting rod is connected with the free end of connecting arm, first screw rod sliding block can slide along the axial direction of short cylinder - head support stand, first drive connecting rod can be telescopic, to drive connecting arm rotate.

[0009] According to one embodiment of the utility model, short cylinder - head inner support module still include second connecting rod, one end of second connecting rod is connected with connecting arm through second screw rod sliding block, the other end of second connecting rod is connected with the free end of connecting rod, second screw rod sliding block can slide along the axial direction of connecting arm, to drive connecting rod rotate.

[0010] According to one embodiment of the utility model, the both sides of connecting rod are provided with support rod respectively, and the support rod is used for tightly abutting the inner side surface of short cylinder - head inner support block.

[0011] According to one embodiment of the utility model, the free end of connecting rod is provided with two-axis connecting rod, and the end portion of the two-axis connecting rod away from the connecting rod is provided with the short cylinder - head inner support block; the two-axis connecting rod can rotate relative to the connecting rod along the axial direction of the two-axis connecting rod, so as to drive the short cylinder - head inner support block to rotate.

[0012] According to one embodiment of the utility model, the end portion of the two-axis connecting rod away from the connecting rod is provided with a rotating shaft perpendicular to the axial direction of the two-axis connecting rod, and the short cylinder - head inner support block is fixedly connected with the rotating shaft; the rotating shaft rotates, so as to drive the short cylinder - head inner support block to rotate relative to the two-axis connecting rod.

[0013] According to one embodiment of the utility model, the upper end surface of short cylinder - head inner support block is provided with a short cylinder - head protection gas inlet, the contact surface of short cylinder - head inner support block and short cylinder is provided with a short cylinder - head arc-shaped gas protection groove along the circumferential direction of the contact surface, and the short cylinder - head protection gas inlet is communicated with the short cylinder - head arc-shaped gas protection groove, so as to provide protection gas to the butt joint ring seam of short cylinder and head.

[0014] According to one embodiment of the utility model, the contact surface of short cylinder - head inner support block and short cylinder can be provided with an arc-shaped inner support red copper steel plate, so as to prevent splashes from adhering to the short cylinder - head inner support block.

[0015] The welding tool for the butt joint ring seam of the short cylinder and the head of the stainless steel rocket storage tank simplifies the process of welding the butt joint ring seam of the short cylinder and the head of the stainless steel storage tank through folding and unfolding of the short cylinder-head inner supporting module.

[0016] It should be appreciated that the foregoing general description and the following detailed description are only exemplary and explanatory, and do not limit the scope of the utility model claimed. BRIEF DESCRIPTION OF DRAWINGS

[0017] The following drawings are part of the specification of the utility model and illustrate example embodiments of the utility model. The accompanying drawings and the description of the specification are used to illustrate the principles of the utility model.

[0018] Figure 1 is a perspective view of the welding tool for the butt joint ring seam of the short cylinder and the head of the stainless steel rocket storage tank of one embodiment of the utility model;

[0019] Figure 2 is an unfolded view of the welding tool for the butt joint ring seam of the short cylinder and the head of the stainless steel rocket storage tank of one embodiment of the utility model;

[0020] Figure 3 is a folded view of the welding tool for the butt joint ring seam of the short cylinder and the head of the stainless steel rocket storage tank of one embodiment of the utility model;

[0021] Figure 4 is a partial perspective view of the short cylinder-head inner supporting module of one embodiment of the utility model;

[0022] Figure 5 is a side view of Figure 4 ;

[0023] Figure 6 is a top view of Figure 4 ;

[0024] Figure 7 is a side view of Figure 4 ;

[0025] Figure 8 is a partial perspective view of the short cylinder-head inner supporting module of one embodiment of the utility model;

[0026] Figure 9 is a perspective view of the short cylinder-head inner supporting block of one embodiment of the utility model.

[0027] EXPLANATION OF REFERENCE NUMERALS:

[0028] 2-3-1 short cylinder-head support base; 2-3-2 foldable column module; 2-3-2-1 rotary gear; 2-3-2-2 driving gear mechanism; 2-3-2-3 short cylinder-head support column; 2-3-2-4 first screw block; 2-3-2-5 first driving link; 2-3-2-6 first ejecting cylinder; 2-3-2-7 connecting arm; 2-3-2-8 second screw block; 2-3-2-9 second link; connecting rod 2-3-2-10; 2-3-2-11 support rod; 2-3-2-12 two-axis connecting rod; 2-3-2-13 short cylinder-head inner support block; 2-3-2-14 second ejecting cylinder; 2-3-2-15 retracting cylinder; 2-3-2-16 short cylinder-head support base column; 2-3-2-13-1 short cylinder-head rolling support surface; 2-3-2-13-2 short cylinder-head arc-shaped air protection groove; 2-3-2-13-3 short cylinder-head protection air inlet. DETAILED DESCRIPTION

[0029] The features and exemplary embodiments of each aspect of the present application will be described in detail below, in order to make the purpose, technical scheme and advantages of the present application more clear and apparent, the present application will be described in further detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application, for exemplary description of the principles of the present application, and are not configured to limit the present application. In addition, the structural members in the drawings are not necessarily drawn to scale. For example, the size of some structural members in the drawings can be enlarged for other structural members or areas to help understand the embodiments of the present application.

[0030] The orientation words appearing in the following description are the directions shown in the drawings, and are not limited to the specific structure of the embodiments of the present application. In the description of the present application, it should be noted that, unless otherwise stated, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In addition, the terms "include", "contain", "have" or any other variant thereof are intended to cover non-exclusive inclusion, so that the inclusion of a series of element structures or components not only includes those elements, but also includes other structures, components not explicitly listed or inherent to the structures, components. Without more limitation, the elements defined by the statement "include" do not exclude the presence of other same elements in the article or device including the elements.

[0032] Spatially relative terms such as "under", "below", "lower", "above", "upper", "on", "over", "side", "top", "bottom", and the like can be used herein for ease of description to describe one element's or portion's relation to another element(s) or portion(s) as illustrated in the various figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device described is turned over, elements described as "below" or "under" other elements or portions would then be oriented "above" the other elements or portions. The spatially relative terms can be used in the descriptions of the present device and its various embodiments described and illustrated herein relative to the various figures (including adjectives such as "first", "second", and the like). The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0033] In the process of describing the present application in the following, "rocket", "carrier rocket", "spacecraft", "space carrier" or "missile" can be used in certain context only for the convenience of description, and the connotation is not limited to the specific word used. Generally, the carrier rocket and rocket of the present application include space carriers for carrying satellites or spaceships or other probes, and various missiles, rockets and other weapons for carrying military payloads, as well as similar products capable of sending payloads into the air. Those skilled in the art should not limit the carrier rocket and rocket to only one of the carrier rocket or missile based on the specific word used in the description context, thereby narrowing the protection scope of the present application.

[0034] For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

[0035] Figure 1 is a perspective view of a welding tool for the butt joint ring seam of a short cylinder and a head of a stainless steel rocket tank of an embodiment of the present application; Figure 2 is an unfolded view of a welding tool for the butt joint ring seam of a short cylinder and a head of a stainless steel rocket tank of an embodiment of the present application; Figure 3 is a folded view of a welding tool for the butt joint ring seam of a short cylinder and a head of a stainless steel rocket tank of an embodiment of the present application; Figure 4 is a partial perspective view of a short cylinder-head inner support module of an embodiment of the present application; Figure 5 is a side view of Figure 4 ; Figure 6 is a top view of Figure 4 ; Figure 7 is a side view of Figure 4 ; Figure 8 is a partial perspective view of a short cylinder-head inner support module of an embodiment of the present application; Figure 9It is a perspective view of the short cylinder-head inner support block of one embodiment of the utility model.

[0036] As shown in Figures 1-3 The utility model provides a kind of welding tool for the butt joint ring seam of stainless steel rocket storage tank short cylinder and head, including: short cylinder-head support base 2-3-1 and foldable column module 2-3-2, short cylinder-head support base 2-3-1 is used to support foldable column module 2-3-2.Foldable column module 2-3-2 includes short cylinder-head support column 2-3-2-3 and short cylinder-head inner support module, short cylinder-head inner support module can rotate around short cylinder-head support column 2-3-2-3, to make the free end of short cylinder-head inner support module close to or away from short cylinder-head support column 2-3-2-3.Foldable column module 2-3-2 can rotate around the circumferential direction of short cylinder-head support base 2-3-1, to drive short cylinder-head inner support module rotate around the circumferential direction of short cylinder-head support base 2-3-1, support the butt joint ring seam of short cylinder and head.

[0037] Specifically, in the existing storage tank head short cylinder welding, the inner support tool is mostly adopted with integral inner support structure, which has the following characteristics: first, it is mainly applied to aluminum alloy or other steel storage tank with wall thickness greater than 4mm, which has high steel property and high roundness requirement, and needs to be integrally supported to meet the production needs;Second, the integral support equipment has complex inner support structure and high manufacturing difficulty, and is limited by the circuit and gas circuit interference of the inner support equipment, so it is difficult to balance the equipment volume and the equipment steel property, and in the case of limited bottom flange of the storage tank bottom head, the integral inner support equipment must weaken the steel property of the inner support tool and reduce the space occupied by the single inner support;Third, the existing integral inner support tool has poor steel property in the radial direction in the manufacture of large storage tank (storage tank with diameter greater than 3.5m), and the support arm is too long, so the tool needs to be inserted into the storage tank with greater depth, and the use range is limited.

[0038] The welding tool of the embodiment is rotated around short cylinder-head support column 2-3-2-3 in the plane of the axis of short cylinder-head support column 2-3-2-3 by short cylinder-head inner support module, so as to realize the folding and unfolding of short cylinder-head inner support module.In the welding of the butt joint ring seam of short cylinder and head, the welding tool does not need to be disassembled, and the support for the welding of the head short cylinder sealing ring seam can be realized through the manhole, so as to simplify the welding process of the butt joint ring seam of stainless steel storage tank short cylinder and head.

[0039] According to one embodiment of the utility model, short cylinder-head support column 2-3-2-3 lower end is provided with short cylinder-head support base column 2-3-2-16, and short cylinder-head support column 2-3-2-3 is rotatably connected with short cylinder-head support base column 2-3-2-16.

[0040] Further, the short cylinder-head support base column 2-3-2-16 is provided with a rotary gear 2-3-2-1 along the circumferential direction thereof, and the short cylinder-head support column 2-3-2-3 is provided with a driving gear mechanism 2-3-2-2 corresponding to the rotary gear 2-3-2-1. The rotary gear 2-3-2-1 cooperates with the driving gear mechanism 2-3-2-2 to drive the short cylinder-head support column 2-3-2-3 to rotate relative to the short cylinder-head support base column 2-3-2-16 or the short cylinder-head support base 2-3-1.

[0041] In the embodiment, the rotary gear 2-3-2-1 can be arranged at the upper end of the short cylinder-head support base column 2-3-2-16, and the driving gear mechanism 2-3-2-2 can be arranged at the lower end of the short cylinder-head support column 2-3-2-3.

[0042] According to an embodiment of the utility model, the short cylinder-head inner support module comprises a connecting arm 2-3-2-7 and a short cylinder-head inner support block 2-3-2-13, and the two ends of the connecting arm 2-3-2-7 are connected with the short cylinder-head support column 2-3-2-3 and the short cylinder-head inner support block 2-3-2-13 respectively. The short cylinder-head inner support block 2-3-2-13 is used for supporting the butt joint ring seam of the short cylinder and the head. The connecting arm 2-3-2-7 can rotate around the short cylinder-head support column 2-3-2-3 to drive the short cylinder-head inner support block 2-3-2-13 to approach or move away from the short cylinder-head support column 2-3-2-3.

[0043] In the embodiment, one end of the connecting arm 2-3-2-7 is rotatably connected with the short cylinder-head support column 2-3-2-3. For example, the connecting arm 2-3-2-7 can be rotatably connected with the top end of the short cylinder-head support column 2-3-2-3, and the folding and unfolding of the foldable column module 2-3-2 is realized through the rotation of the connecting arm 2-3-2-7. The end surface of the short cylinder-head inner support block 2-3-2-13 in contact with the short cylinder or the head can be an arc surface or a cylindrical surface, for example, the radius of the arc surface can be equal to the radius of the inner surface of the short cylinder. The short cylinder-head inner support block 2-3-2-13 can be a non-integer circle, for example, the circumferential length of the short cylinder-head inner support block 2-3-2-13 can be 1 / X of the inner circumferential length of the short cylinder, and X can be 3-12. For example, the arc length of the arc surface of the short cylinder-head inner support block 2-3-2-13 can be 1-3m, and the width can be 50-200mm. After the short cylinder-head inner support module is folded and contracted, the overall volume and space occupied is about 1 / X of the space occupied by the integer circle type inner support tool, which can reduce the complexity and cost of the system.

[0044] According to one embodiment of the utility model, in addition to the connecting arm 2-3-2-7 and the short cylinder - head inner support block 2-3-2-13, the short cylinder - head inner support module further includes a connecting rod 2-3-2-10. The two ends of the connecting rod 2-3-2-10 are respectively used for connecting the free end of the connecting arm 2-3-2-7 and the short cylinder - head inner support block 2-3-2-13. The connecting rod 2-3-2-10 can rotate around the connecting arm 2-3-2-7 (for example, can rotate in the plane where the axis of the connecting arm 2-3-2-7 is located), so that the short cylinder - head inner support block 2-3-2-13 is close to or away from the butt joint ring seam of the short cylinder and the head.

[0045] In the embodiment, one end of the connecting rod 2-3-2-10 can be connected with the free end of the connecting arm 2-3-2-7 through a pin, and the connecting rod 2-3-2-10 can rotate around the pin (that is, perform circular arc motion), so as to realize the opening and closing of the connecting arm 2-3-2-7 and the connecting rod 2-3-2-10. As shown in Figure 4 and 5 The connecting rod 2-3-2-10 can be L-shaped.

[0046] According to one embodiment of the utility model, in addition to the connecting arm 2-3-2-7 and the short cylinder - head inner support block 2-3-2-13, the short cylinder - head inner support module further includes a first driving link 2-3-2-5. One end of the first driving link 2-3-2-5 is connected with the short cylinder - head support column 2-3-2-3 through the first screw rod sliding block 2-3-2-4, and the other end of the first driving link 2-3-2-5 is connected with the free end of the connecting arm 2-3-2-7. The first screw rod sliding block 2-3-2-4 can slide along the axial direction of the short cylinder - head support column 2-3-2-3, and the first driving link 2-3-2-5 can be telescopic, so as to drive the connecting arm 2-3-2-7 to rotate.

[0047] In the embodiment, the short cylinder - head support column 2-3-2-3 is provided with a first screw rod along the axial direction thereof, the first screw rod sliding block 2-3-2-4 moves along the first screw rod, and the first driving link 2-3-2-5 pushes the connecting arm 2-3-2-7 to perform opening and closing arc motion around the short cylinder - head support column 2-3-2-3. The first driving link 2-3-2-5 can adopt a pneumatic cylinder.

[0048] According to one embodiment of the utility model, the side surface of the short cylinder - head support column 2-3-2-3 is provided with a first ejection cylinder 2-3-2-6. The first ejection cylinder 2-3-2-6 is ejected, cooperates with the first screw rod sliding block 2-3-2-4 and the first driving link 2-3-2-5, and pushes the connecting arm 2-3-2-7 to rotate.

[0049] In the embodiment, when the connecting arm 2-3-2-7 is substantially attached or parallel to the short cylinder-head support column 2-3-2-3, the first ejection cylinder 2-3-2-6 is ejected, and the first screw block 2-3-2-4 and the first driving link 2-3-2-5 are matched to push the connecting arm 2-3-2-7 to rotate, so as to open the connecting arm 2-3-2-7. The first ejection cylinder 2-3-2-6 can be an electric driving cylinder. The first ejection cylinder 2-3-2-6 can be mounted on the side of the short cylinder-head support column 2-3-2-3 through a screw.

[0050] According to an embodiment of the utility model, in addition to the connecting arm 2-3-2-7, the short cylinder-head inner support block 2-3-2-13 and the connecting rod 2-3-2-10, the short cylinder-head inner support module further comprises a second link 2-3-2-9. One end of the second link 2-3-2-9 is connected with the connecting arm 2-3-2-7 through a second screw block 2-3-2-8, and the other end of the second link 2-3-2-9 is connected with the free end of the connecting rod 2-3-2-10. The second screw block 2-3-2-8 can slide along the axial direction of the connecting arm 2-3-2-7 to drive the connecting rod 2-3-2-10 to rotate.

[0051] In the embodiment, the connecting arm 2-3-2-7 is provided with a second screw along the axial direction thereof, and the second screw block 2-3-2-8 moves along the second screw to drive the second link 2-3-2-9 to push or pull the connecting rod 2-3-2-10 to rotate, so as to open and close the connecting arm 2-3-2-7 and the connecting rod 2-3-2-10. The two ends of the second link 2-3-2-9 can be respectively connected with the second screw block 2-3-2-8 and the connecting rod 2-3-2-10 through pins. The foldable column module can drive the connecting arm 2-3-2-7 and the connecting rod 2-3-2-10 to rotate through the first driving link 2-3-2-5 and the second link 2-3-2-9, so as to realize the folding and unfolding of the foldable column module 2-3-2.

[0052] According to an embodiment of the utility model, a second ejection cylinder 2-3-2-14 is arranged on the side of the connecting arm 2-3-2-7. The second ejection cylinder 2-3-2-14 is ejected to push the connecting rod 2-3-2-10 to rotate in cooperation with the second screw block 2-3-2-8 and the second link 2-3-2-9.

[0053] In the embodiment, for example, when the connecting rod 2-3-2-10 is substantially attached or parallel to the connecting arm 2-3-2-7, the second ejecting cylinder 2-3-2-14 is ejected, cooperating with the second screw block 2-3-2-8 and the second connecting rod 2-3-2-9, to push the connecting rod 2-3-2-10 to rotate, so as to open the connecting rod 2-3-2-10. The second ejecting cylinder 2-3-2-14 can be an electrically driven cylinder. The second ejecting cylinder 2-3-2-14 can be mounted on the side of the connecting arm 2-3-2-7 through a screw.

[0054] As shown in Figure 4 and 6 , according to an embodiment of the utility model, the two sides of the connecting rod 2-3-2-10 are respectively provided with support rods 2-3-2-11, which are used to tightly press the inner side of the short cylinder-head inner support block 2-3-2-13.

[0055] In the embodiment, for example, when the outer side of the short cylinder-head inner support block 2-3-2-13 tightly presses the short cylinder skin, the support rod 2-3-2-11 tightly presses the inner side of the short cylinder-head inner support block 2-3-2-13 to provide internal support and positioning for the short cylinder-head inner support block 2-3-2-13. The two sides of the connecting rod 2-3-2-10 are respectively provided with support rods 2-3-2-11, which can provide more uniform internal support for the short cylinder-head inner support block 2-3-2-13, improve the rigidity of the system, and at the same time, can improve the ability of the short cylinder-head inner support block 2-3-2-13 to withstand radial pressure, so as to make the support more stable. For example, the support rod 2-3-2-11 can be a cylinder support rod. One end of the support rod 2-3-2-11 is rotatably connected with the connecting rod 2-3-2-10.

[0056] As shown in Figure 6 and 7 , according to an embodiment of the utility model, the connecting rod 2-3-2-10 is provided with a retracting cylinder 2-3-2-15 for connecting the support rod 2-3-2-11, and the retracting cylinder 2-3-2-15 is retracted to make the support rod 2-3-2-11 rotate close to or away from the connecting rod 2-3-2-10.

[0057] In the embodiment, the retracting cylinder 2-3-2-15 is retracted to control the support rod 2-3-2-11 to rotate close to or away from the connecting rod 2-3-2-10, so as to open and close the support rod 2-3-2-11. The retracting cylinder 2-3-2-15 can be a cylinder. The retracting cylinder 2-3-2-15 can be arranged in the connecting rod 2-3-2-10.

[0058] According to one embodiment of the utility model, the free end of the connecting rod 2-3-2-10 is provided with a two-axis connecting rod 2-3-2-10, and the end of the two-axis connecting rod 2-3-2-10 away from the connecting rod 2-3-2-10 is provided with a short cylinder-head inner support block 2-3-2-13. For example, the two-axis connecting rod 2-3-2-10 can rotate relative to the connecting rod 2-3-2-10 around the axial direction of the two-axis connecting rod 2-3-2-10 to drive the short cylinder-head inner support block 2-3-2-13 to rotate.

[0059] In the embodiment, the end of the connecting rod 2-3-2-10 for connecting the two-axis connecting rod 2-3-2-12 can be provided with a first motor 2-3-2-12-1, and the first motor 2-3-2-12-1 is used to drive the two-axis connecting rod 2-3-2-12 and the short cylinder-head inner support block 2-3-2-13 to rotate around the axial direction of the connecting rod 2-3-2-10, so as to realize the folding of the short cylinder-head inner support block 2-3-2-13.

[0060] As shown in Figure 8 According to one embodiment of the utility model, the end of the two-axis connecting rod 2-3-2-10 away from the connecting rod 2-3-2-10 is provided with a rotating shaft 2-3-2-12-3 perpendicular to the axial direction of the two-axis connecting rod 2-3-2-10, and the short cylinder-head inner support block 2-3-2-13 is fixedly connected with the rotating shaft 2-3-2-12-3. The rotating shaft 2-3-2-12-3 rotates to drive the short cylinder-head inner support block 2-3-2-13 to rotate relative to the two-axis connecting rod 2-3-2-10.

[0061] In the embodiment, the rotating shaft 2-3-2-12-3 rotates to drive the short cylinder-head inner support block 2-3-2-13 to rotate around the two-axis connecting rod 2-3-2-12 in the plane where the axis of the two-axis connecting rod 2-3-2-12 is located, so as to realize the further folding of the short cylinder-head inner support block 2-3-2-13. The two-axis connecting rod 2-3-2-12 can be provided with a second motor 2-3-12-2 connected with the rotating shaft 2-3-2-12-3, and the second motor 2-3-12-2 is used to drive the rotating shaft 2-3-2-12-3 to rotate around the axial direction of the rotating shaft 2-3-2-12-3, so as to drive the short cylinder-head inner support block 2-3-2-13 to rotate around the two-axis connecting rod 2-3-2-12 in the plane where the axis of the two-axis connecting rod 2-3-2-12 is located. The first motor 2-3-2-12-1 and the second motor 2-3-12-2 cooperate to realize the opening and closing of the short cylinder-head inner support block 2-3-2-13 and the connecting rod 2-3-2-10. The welding tool is folded through multiple degrees of freedom, which further reduces the occupied volume and space.

[0062] As shown in Figure 9As shown, according to one embodiment of the present application, the upper end surface of the short cylinder-head inner support block 2-3-2-13 is provided with a short cylinder-head protective gas inlet 2-3-2-13-3, and the contact surface of the short cylinder-head inner support block 2-3-2-13 with the short cylinder is provided with a short cylinder-head arc-shaped gas protection groove 2-3-2-13-2 along the circumferential direction thereof, and the short cylinder-head protective gas inlet 2-3-2-13-3 is in communication with the short cylinder-head arc-shaped gas protection groove 2-3-2-13-2, so as to provide protective gas to the butt joint ring gap of the short cylinder and the head.

[0063] In the present embodiment, the upper end surface of the short cylinder-head inner support block 2-3-2-13 can be provided with a plurality of short cylinder-head protective gas inlets 2-3-2-13-3 along the length direction thereof. The groove width of the short cylinder-head arc-shaped gas protection groove 2-3-2-13-2 can be 5-20mm, and the groove depth can be 20-50mm. The distance of the short cylinder-head arc-shaped gas protection groove 2-3-2-13-2 from the upper end surface of the short cylinder-head inner support block 2-3-2-13 can be 100mm.

[0064] According to one embodiment of the present application, the contact surface of the short cylinder-head inner support block 2-3-2-13 with the short cylinder can be provided with an arc-shaped inner support red copper steel plate, so as to prevent splashes from adhering to the short cylinder-head inner support block 2-3-2-13.

[0065] In the present embodiment, the arc-shaped inner support red copper steel plate can be arranged around the short cylinder-head arc-shaped gas protection groove 2-3-2-13-2.

[0066] According to one embodiment of the present application, the contact surface of the short cylinder-head inner support block 2-3-2-13 with the short cylinder is provided with a short cylinder-head rolling support surface 2-3-2-13-1 along the circumferential direction thereof. When rolling the butt joint ring gap of the short cylinder and the head, the short cylinder-head rolling support surface 2-3-2-13-1 is used for supporting the ring gap.

[0067] In the present embodiment, the short cylinder-head rolling support surface 2-3-2-13-1 can be arranged at a position 50mm below the short cylinder-head arc-shaped gas protection groove 2-3-2-13-2, and the width of the short cylinder-head rolling support surface 2-3-2-13-1 can be 20-60mm. The short cylinder-head rolling support surface 2-3-2-13-1 can be inlaid in the short cylinder-head inner support block 2-3-2-13 by using a steel plate or a hard alloy as a base material.

[0068] The above embodiments of the present application can be combined with each other, and have corresponding technical effects.

[0069] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A welding fixture for the circumferential seam between the short cylinder and the head of a stainless steel rocket propellant tank, characterized in that, include: A short cylinder-head support base and a foldable column module, wherein the short cylinder-head support base is used to support the foldable column module; The foldable column module includes a short cylinder-head support column and a short cylinder-head inner support module. The short cylinder-head inner support module can rotate around the short cylinder-head support column so that its free end approaches or moves away from the short cylinder-head support column. The foldable column module can rotate around the circumferential direction of the short cylinder-head support base so that the short cylinder-head inner support module rotates around the circumferential direction of the short cylinder-head support base to support the circumferential seam between the short cylinder and the head.

2. The welding fixture according to claim 1, characterized in that, The short cylinder-head inner support module includes a connecting arm and a short cylinder-head inner support block. The two ends of the connecting arm are connected to the short cylinder-head support column and the short cylinder-head inner support block, respectively. The short cylinder-head inner support block is used to support the circumferential seam between the short cylinder and the head. The connecting arm can rotate around the short cylinder-head support column to move the short cylinder-head inner support block closer to or away from the short cylinder-head support column.

3. The welding fixture according to claim 2, characterized in that, The short cylinder-head inner support module also includes a connecting rod; the two ends of the connecting rod are respectively used to connect the free end of the connecting arm and the short cylinder-head inner support block. The connecting rod can rotate around the connecting arm so that the short cylinder-head inner support block is close to or away from the mating circumferential seam between the short cylinder and the head.

4. The welding fixture according to claim 2, characterized in that, The short cylinder-head inner support module also includes a first drive link; one end of the first drive link is connected to the short cylinder-head support column via a first lead screw slider, and the other end of the first drive link is connected to the free end of the connecting arm; the first lead screw slider can slide along the axial direction of the short cylinder-head support column, and the first drive link can extend and retract to drive the connecting arm to rotate.

5. The welding fixture according to claim 3, characterized in that, The short cylinder-head inner support module also includes a second connecting rod; one end of the second connecting rod is connected to the connecting arm via a second lead screw slider, and the other end of the second connecting rod is connected to the free end of the connecting rod; the second lead screw slider can slide along the axial direction of the connecting arm to drive the connecting rod to rotate.

6. The welding fixture according to claim 3, characterized in that, Support rods are provided on both sides of the connecting rod, and the support rods are used to press against the inner side of the short cylinder-head inner support block.

7. The welding fixture according to claim 3, characterized in that, The free end of the connecting rod is provided with a dual-axis connecting rod, and the end of the dual-axis connecting rod away from the connecting rod is provided with the short cylinder-head inner support block; the dual-axis connecting rod can rotate relative to the connecting rod about its axial direction, so as to drive the short cylinder-head inner support block to rotate.

8. The welding fixture according to claim 7, characterized in that, The end of the dual-axis connecting rod away from the connecting rod is provided with a rotating shaft perpendicular to its axial direction, and the short cylinder-head inner support block is fixedly connected to the rotating shaft; the rotation of the rotating shaft drives the short cylinder-head inner support block to rotate relative to the dual-axis connecting rod.

9. The welding fixture according to claim 2, characterized in that, The upper end face of the inner support block of the short cylinder-head is provided with a protective gas inlet for the short cylinder-head. The contact surface between the inner support block of the short cylinder-head and the short cylinder is provided with an arc-shaped gas-insulating groove for the short cylinder-head along its circumferential direction. The protective gas inlet of the short cylinder-head is connected to the arc-shaped gas-insulating groove for the short cylinder-head to provide protective gas to the circumferential seam where the short cylinder and the head are joined.

10. The welding fixture according to claim 2, characterized in that, The contact surface between the short cylinder-head inner support block and the short cylinder can be provided with an arc-shaped inner support copper steel plate to prevent splashes from sticking to the short cylinder-head inner support block.

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